Asking the Right Questions About Class Size

My post today at WHYY Newsworks looks at the recent class size kerfuffle instigated by Mitt Romney's visit to a Philadelphia charter school:
Mitt Romney visited a charter school in West Philadelphia last Thursday and, either brazenly or cluelessly, addressed that third rail of education politics, class size.
"In schools that are the highest-performing in the world," he said, "their classroom sizes are about the same as in the United States. So it's not the classroom size that's driving the success of those school systems."
An opportunity for a rational discussion of the costs and benefits of small class size?
More like a greedy Democratic pounce on Romney's education street cred. President Obama's spokeswoman sneered, "What planet does he live on?"
Read the rest here.